Tool-rest adjustment.



Patented Oct. I5, l90l.

J. J. GRANT.

TOOL REST ADJUSTMENT.

(Application filed Jan. 14, 1901.

(No Model.)

l enfory UNITE s aitw'r uric,

JOHN J. GRANT, OF CLEVELAND, OHIO.

TOOL-=REST ADJUSTMENT.

SPECIFICATION forming part of Letters Patent No. 684,508, dated October15, 1901.

Application filed January 14, 1901. Serial No. 43,184. (No model.)

To ctZZ whom it may concern.-

Be it known that 1, JOHN J. GRANT, a citizen of the United States,residing at Cleveland, in the county of Ouyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Tool-Rest Adjustments,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings.

The invention is applicable particularly to lathes; and the object is toprovide novel means for quickly adjusting and securing the tool-rest inany desired position relative to the work.

The invention consists in the construction and combination of partshereinafter described, and pointed out definitely in the claims.

In the drawings, Figure 1 is a plan view showing my invention. Fig. 2 isa sectional View on the line 2 2 of Fig. 1; and Fig. 3 is a sectionalview on line 3 3, Fig. 1.

Referring to the parts by letters, A represents the tool-rest plate,which has near one end and uponits upper side a socket a, in which thetool-rest D may be adjustably secured by means of the set-screw O. Inthe under side of this plate is a T-shaped groove a. This plate A restsupon what may be termed a Worm-block B, which block rests upon the bed Fof the machine. Lathes and other machines in which this invention may beused very commonly are provided with a slide which supports thetool-rest and by means of which it may be moved to the right or left.Such aslide is indicated by G in the drawings, audit is mounted in adovetailed wayfiu the bed of the machine. The worm-block lies over thisslide, resting, as before stated, upon the bed of the machine.

K represents a vertical screw, which is oppositely threaded at its ends.Its lower end screws into the slide G, and its upper end screws into aflanged nut H, which lies in the T-shaped groove a in the tool-rest, thebody of said nut projecting a short distance into the worm-block.Secured to or formed upon this screw K is a worm-wheel J, which lies ina recess 2) in the wornrblock. A worm M is mounted in this worm-block soas to engage with this worm-wheel, and it has a milled head at securedto its projecting end. By turning this worm in one direction the partsare loosened up and the slide A may be turned upon the nut H as a pivotand may be moved in the direction of its slot to any extent desired. Theslide G may also be moved as de sired, the result being that thetool-restD may be brought into any desired position relative to thework. Now by turning the worm in the opposite direction all of the partsdescribed are firmly clamped together and to the bed-plate of themachine-that is: to say, the plateA is clamped by the nut H upon theblock B, the slide G is drawn up against the overhanging edges of thedovetailed Way in which it moves, and the block B is drawn down againstthe bed, thereby, as before stated, immovably fixing for the time beingall the parts described, with the tool-rest in the desired position.

For convenience it is preferable to prevent the worm-block from turningupon the screw K as a pivot, and to that end a dowel-pin N is set intotwo recesses in the slide G and the block 13, respectively, as shown inFig. 3.

Having described my invention, I claim-- 1. The combination ofatool-rest plate having a T-shaped groovein its under side, and aworm-block upon which it rests, combined with a clamping-nut having aflange which lies in said T-shaped groove, a screw oppositely threadedat its ends, the upper end screwing into said nut, and the lower endinto a part of the machine below said block,- a worm wheel secured tosaid screw, and a worm mounted in the worm block and en-' gaging thesaid worm-wheel, substantially as and for the purpose specified.

2. The combination of a supporting bedplate, a slide movable therein ina dovetailed way, a worm-block resting on the bed-plate over said slide,and a tool-rest plate resting upon the worm-block and havinga T-shapedgroove in its under side, with ascrew having oppositely-threaded ends ofwhich the lower end screws into said slide, a flanged clamping-nut whichlies in said T-shaped groove and screws onto the upper end of saidscrew, a worm-wheel rigid With said screw, and a worm mounted in theworm block and engaging with said worn1-wheel.

In testimony whereof I hereunto affix my signature in the presence oftwo Witnesses.

JOHN J. GRANT.

Witnesses:

ALBERT H. Bn'rns, E. B. GILCHRIST.

